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| author | Mohammed Shafi Shajakhan <mshajakhan@atheros.com> | 2011-02-15 21:29:32 +0530 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2011-02-15 11:16:00 -0500 |
| commit | 0f5cd45960173ba5b36727decbb4a241cbd35ef9 (patch) | |
| tree | 6e4528d6eee03aec59b3b630aae272f34e7f27b7 /drivers/net/wireless/ath/ath9k/init.c | |
| parent | a7b545f7fe753ca3dc1b51ca57f90cd59d974e44 (diff) | |
| download | op-kernel-dev-0f5cd45960173ba5b36727decbb4a241cbd35ef9.zip op-kernel-dev-0f5cd45960173ba5b36727decbb4a241cbd35ef9.tar.gz | |
ath9k: Fix ath9k prevents CPU to enter C3 states
The DMA latency issue is observed only in Intel pinetrail platforms
but in the driver we had a default PM-QOS value of 55. This caused
unnecessary power consumption and battery drain in other platforms.
Remove the pm-qos thing in the driver code and address the throughput
issue in Intel pinetrail platfroms in user space using any one of
the scripts in below links:
http://www.kernel.org/pub/linux/kernel/people/mcgrof/scripts/cpudmalatency.c
http://johannes.sipsolutions.net/files/netlatency.c.txt
More details can be found in the following bugzilla link:
https://bugzilla.kernel.org/show_bug.cgi?id=27532
This reverts the following commits:
98c316e348bedffa730e6f1e4baeb8a3c3e0f28b
4dc3530df7c0428b41c00399a7ee8c929406d181
10598c124ecabbbfd7522f74de19b8f7d52a1bee
Signed-off-by: Mohammed Shafi Shajakhan <mshajakhan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/ath/ath9k/init.c')
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/init.c | 8 |
1 files changed, 0 insertions, 8 deletions
diff --git a/drivers/net/wireless/ath/ath9k/init.c b/drivers/net/wireless/ath/ath9k/init.c index 087a6a9..a033d01 100644 --- a/drivers/net/wireless/ath/ath9k/init.c +++ b/drivers/net/wireless/ath/ath9k/init.c @@ -41,10 +41,6 @@ static int ath9k_btcoex_enable; module_param_named(btcoex_enable, ath9k_btcoex_enable, int, 0444); MODULE_PARM_DESC(btcoex_enable, "Enable wifi-BT coexistence"); -int ath9k_pm_qos_value = ATH9K_PM_QOS_DEFAULT_VALUE; -module_param_named(pmqos, ath9k_pm_qos_value, int, S_IRUSR | S_IRGRP | S_IROTH); -MODULE_PARM_DESC(pmqos, "User specified PM-QOS value"); - bool is_ath9k_unloaded; /* We use the hw_value as an index into our private channel structure */ @@ -762,9 +758,6 @@ int ath9k_init_device(u16 devid, struct ath_softc *sc, u16 subsysid, ath_init_leds(sc); ath_start_rfkill_poll(sc); - pm_qos_add_request(&sc->pm_qos_req, PM_QOS_CPU_DMA_LATENCY, - PM_QOS_DEFAULT_VALUE); - return 0; error_world: @@ -831,7 +824,6 @@ void ath9k_deinit_device(struct ath_softc *sc) } ieee80211_unregister_hw(hw); - pm_qos_remove_request(&sc->pm_qos_req); ath_rx_cleanup(sc); ath_tx_cleanup(sc); ath9k_deinit_softc(sc); |
